In this the power o/p from the two dipoles are added in anti-phase
or in some other phase thus changing the radiation patterns and combined using
power combiner. This helps in achieve more gain in particular direction.

Depending on the phase difference between the dipoles; Dual
Dipole Array can be operated in two modes of Endfire case.

Mode 1:-

In this the signals are added in antiphase. This can be achieved
by addition of half wavelength long cable to either of the dipole along with
the existing half wavelength cable. This will cause the radiation in two lobes
along East and West direction if dipoles are North-South aligned. This mode
can be used when Jupiter is at lower altitudes.

In this mode phase difference between two dipoles is 90 degree.
This is achieved by adding the quarter wavelength cable to any one of the
dipole along with the existing half wavelength cable. Mode 2 will give more
gain towards one particular direction.

If the dipoles are North-South aligned and phasing cable (quarter
wavelength section) is added to East dipole then East lobe will have more
gain. Similarly if the dipoles are East-West aligned and phasing cable is
added to South dipole then South lobe will have more gain.

Mode 2 is more useful if Jupiter is in the southern sky for
higher latitude observers.